Hot-air stove



June 7,1927. 7 1,631,721 DE BOISCHEVALIER HOT AIR STOVE Filed 001' 20,1922 illlll INVENTOR v Patented dune 7, 1927.

UNITED; STATES 1,631,721 PATENT OFFICE.

HENRI mt IBOISCHEVALIEB, OF DETROIT, MICHIGAN, ASSIGNOR TO SOOIETE DUCAB- BUBAIEUB. ZENITH, OF LYON, FRANCE, A QOBPORA'I'ION OF FRANCE.

HOT-AIR STOVE.

Application filed October 20, 1922. Serial No. 595,879.

( The present invention relates to an accessory for use with an internalcombustion engine and the carburetor therefor, whereby the air suppliedto the carburetor may be preheated if desired.

At the present time it is customary to provide various forms of stovesor heaters by means of which it is possible to reheat the air suppliedto a carburetor. rdfinarily,

however, stoves .for this purpose have been in the form of comparativelybulky castings thereby requiring considerable room and the use of aseries of fastening devices for maintaining the same in the desiredposition. As

it is frequently desirableto remove such stoves to permit repairs on theengine, or

'. for other reasons, it is desirable that the stove shall be ofcomparatively simple constructionrequiring a minimum number of fasteningdevices.

By the present invention there is provided a stove for this purposewhich may be easily and effectively clamped in position on an exhaustpipe or other heating member and which occupies a minimum amount ofroom.

- In the accompanyin drawings there is shown for purposes 0 illustrationonly, a

preferred embodiment of the present invention, it being understood thatthe drawings 9 do not define the limits of this invention, as changesmay be made in the construction 1 and operation disclosed herein withoutdearting from the spirit or scope of my roader clam. 5 In the drawings,

Figure 1 is a perspective view'of a portion of an exhaust pipe havingthe improved stove in position thereon;

Figure 2 is a sectional view through the construction illustrated inFigure 1, certain of the parts being shown in elevation and other partsbeing broken away for sake of clearness. v Figure 3 is a transversesectional view on thefline III-III of Figure 2; and

Figure 4 is a side elevation largely diagrammatic, illustrating themanner inwhich the stove may be connected to a carburetor. A hotairstove cdnstructed in accordance with the-present invention preferablycomprises a' casing 2 of-sheetmetal of such "auge that the same is moreor less flexible.

1 it the upper end of the casing there 'is formed a series of inwardlyextending over-.

lapping projections 3 adapted to slide one upon the other and therebypermit the easing to conform to exhaust pipes 4:, or other heatingmembers of varying diameters. These pro ections are preferably so formedas to position the casing eccentrically with respect to the heatingmember. The adjacent edges of the casing 2 are preferably inturned toprovide flanges 5 adapted to extend substantially radially to a heatingmember when in position thereon and abut there against throughsubstantially the entire lengthof t e casing. In this manner there isprovided a heating chamber between the casing and the exterior wall ofthe heating member, its lower end to permit the required air to readilypass thereinto.

Formed in the casing adjacent the upper end thereof is an opening 6adapted to receive the projection 7 on a casting 8. This casting is heldin position within the casing by a screw 9 at its upper end and by asecond screw 10' at its lower end.' The screw 10 preferably passesloosely through a suitable opening in the casing and is then threadedthrough an opening in the casting. By reason of this construction it ispossible after the casing is in position on a heating member to loosenthe lock nut ,11 and turn the screw 10 inwardly into engagement with theheating member. This in turn also draws the flanges 5 tightlyintoengagement with said member..

For initially clamping the casing'in approximate position, there may berovided a strap 12 having at one end a 00k 13 adapted to slip under astruck-out portion 14 in the casing 2. The free end of'the strap is thenpassed under a second struck- .out portion 15, theedges of the casingare drawn together and the strap is bent backwardly upon itself. It willbe apparent that this strap provides means for easily clam ing thecasing in position and holding t e same while it is "drawniuto finalposition by the screw 10.

T 'projection 7 on 'the castin g8 has an openi ng 16 therethroughadapted toreceive" an air-conducting pipe '17 leading-to the air intake.18. of a carburetor of an well known construction. For limiting t eextent to which the pipe 17 may enter the projection, the casting may beprovided with which casing is preferably open at I 1. As an article ofmanufacture, a hot air stove for carburetors, comprising a casing stovefor carburetors, comprising a one piece" adapted to be bent aroundheating members of different diameters, said casing having a flexibleend wall adapted to seal one end thereof irrespective of the diameter ofthe heating members, substantially as described.

2. As an article of manufacture, a'hot air flexible and deformablecasing adapted to be bent at will around a heating member within thecapacity of the stove irrespective of the diameter of such heatingmember, and to occupy a predetermined spaced relation )theretoirrespective of such diameter, and

means for maintaining the same in eccentric relation to said member,said stove having a heated air off-take adjacent the point of maximumspacing of said casing from the heating means, substantially as.described.

3. As an article of manufacture a hot air. stove for carburetors,comprising a flexible casing ada ted to be bent around heating members 0different diameters, said casinghaving at least one end wall freelyextensible circumferentially fectively cooperate w th a. heating memberirrespective of the diameter ofthe heating member towhich the casing isapplied to' I effectively close one end thereof against air inflow, andmeans for holding the casing in position on a heating member,substantially as described.

4. As an article of manufacture, a flexible casing adapted to cooperatewith a heating member and to supply heated air to a carburetor, saidcasing having inturned edges adapted to abut the surface of. the heatingmember throughout substantially the entire length of the casing, meansfor drawing said ed es toward each other, and means for tig tening thecasing on the heating members, substantially as described.

5. As an article of manufacture, afiexible casing adapted to cooperatewith a heating member and supply heatedair .to' a car buretor, saidcasing having inturned ed es adapted to abut the surface of the heatingmember throughout substantially theentirelength of the casing, andhaving inturned overlapping projections at one end cooperatin with theperiphery of the heating mem r, substantially vas described.

and adapted to ef-.

answer 6.. As an article of manufacture, a flexible member and supplyheated air to a carburetor, said casing having inturned edges adapted toabut'the surface of the heating member throughout substantially theentire length of the casing, and having inturned projections at one endcooperating with the periphery of the heating member, said projectionsbeing formed to maintain the easing in eccentric relationship to theheating member, and effectively close one end thereof, substantially asdescribed.

7. As an article of manufacture, a hot air stove for carburetors,comprising a flexible casing adapted to be bent around a heating member,said casing having at one'end inwardly extending overlapping projectionsforming a circumferentially extensible end wall closure adapted toengage the periphery of the heating member, substantially as described.

8. As an article of manufacture, a hot airstove for carburetors,comprising a flexible casing adapted to-be bent around a heating.member, said casing having at one end inmember, means for holding thecasing tight-' ly in engagement with said member, and separate means foradjusting the casing ,rel-' atively to the heating member, substantiallyas described.

10. As an article of manufacture, a flexible casing adapted to be bentaround an exhaust pipe saidcasing having edge flanges adapted but suchpipe throughout substantially the entire length of the casing, inwardlyprojecting casing or engagement with the periphery of such pipe,aabendable strap for holding said casing in osition, and removable meansin the cas ng or connection with the air in-' take of a carburetor,substantially as do? scribed.

ortions formed on one end of said 11. As an article of manufacture, aflexible P casing adjustable to conform to exhaust pipes of differentdiameters, inturned edges on two sides of said casing adapted to abutagainst an exhaust pipe and both effectively close the casing withrespect thereto and space the'same therefrom, a circumferentially.extens1ble endwall on one end of said casing, means for securing saidcasing in its . posit on and preventing separation o edges, and meansfor tightening the casing inposition, substantially as described. 12. Asan article of manufacture, a flexible casing adjustable "to conform toexhaust pipes of different diameters, inturned edges on two sides ofsaid casing adapted to abut against an exhaust pipe and bothefi'ectively c ose the casing wlth respect thereto and spaoe the sametherefrom, a circumferentialwall, substantially as described.

13. As an article of manufacture, a flexible casing adjustable toconform to exhaust pipes of difi'erent diameters, inturned edges on twosides of said casing-adapted to abut against an exhaust pipe and botheffectively close the casing with respect thereto and space the sametherefrom, and a flexible end wall on said casing adapted to effectivelyclose one end thereof irrespective of the diameter of the exhaust pipeto which the casing is applied, said end wall comprising a plurality ofoverlapping projections, substantially as described.

14. As an article of manufacture, a flexible casing adjustable toconform to exhaust pipes of different diameters, inturnededges on twosides of said casing adapted to abut against an exhaust pipe and botheflectively close the casing with respect thereto and space the sametherefrom, and a flexible end wall on said casing adapted to eflectivelyclose one end thereof irrespective of the diameter of the exhaust pipeto which the casing is applied, said end wall comprising a plurality ofoverlapping projections of gradually increasing length from each side ofthe casin toward the center, substantially as described. I Y

In testimony whereof I have hereunto set my hand.

HENRI DE BOISGHEVALIER,

